Improvement in photographic vignetting devices



F. H. PRICE & A. S. CAMPBELL. Photographic Vignett ing Device.

N0.199,466. Patented Jan. 22,1878.

' ATTORNEYS UNITED STATES PATENT OFFICE.

FRANCIS H. PRICE, OF IRVINGTON, AND ALFRED S. CAMPBELL, OF ELIZA- BETH,NEW JERSEY.

IMPROVEMENT IN PHOTOGRAPHIC VIGNETTING DEVlCES.

Specification forming part of Letters Patent No. 199,466, dated January22, 1878; application filed November 6, 1877.

To all whom it may concern Be it known that we, FRANCIS H. PRICE, ofIrvington, in the county of Essex and State of New Jersey, and ALFRED S.CAMPBELL, of Elizabeth, in the county of Union, and State of New Jersey,have invented a new and Improved Process and Apparatus for Making IvoryGameotypes, of which the following is a specification:

Figure l is a front elevation of a vignetting attachment. Fig.2 is avertical section taken on line {E w in Fig. 1. Fig. 3 is a verticaltrans verse section of a background employed in connection with thevignetting attachment.

Similar letters of reference indicate corresponding parts.

Our invention relates to a process for making the style of photographicpicture known as the cameotype, and the apparatus for carrying out theprocess.

The invention consists in taking the nega tive, by means of an ordinaryphotographic camera, through a vignetting-shield which is inclosed andshaded, so that it will take perfectly black.

Referring to the drawing, A is a vignetteshield, which is provided withinwardly-projecting points of the usual description. This shield isfitted in ways at the front of the box B, and slides easily up or down.

Two standards, a, are attached to the top of the box, for supportingpulleys I). Cords c are attached. to the upper end of the shield A andrun over the pulleys b, and are attached to a single cord, 0, which isknotted at short intervals, and is received between two pins, (1, at theback of the box. By means of this knotted cord the vignette-shield issupported at any desired height.

The box B is supported in front of the camera, and the camera-tube isallowed to project more or less into it, as indicated in dotted lines inFig. 3.

The background, which is mounted on the frame (J in the usual way, has ablack face, and is shaded by a screen, D, across the top, and curtains Eat the sides, which are supported by a frame, F, which is pivoted to thesides of the frame 0, so that the screen and curtains may be folded upwhen required.

The subject sits in front of the shaded background, and the negative istaken through the shaded vignette-shield. The shading of the vignetteshield and the background insures perfect transparency in the backgroundon the negative, by preventing the reflection of light from either ofthese surfaces. The background being transparent in the negative rendersthe background in the print perfectly black.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent An adjustable vignette-shield, in combinationwith a box for shading the same, as and for the purpose specified.

FRANCIS H. PRICE. ALFRED S. CAMPBELL. lVitnesses:

O. SEDGWIOK, ALEX. F. ROBERTS.

